a fool knows more in his own house than a wise man in another

US /ə ˈfuːl noʊz ˌmɔːr ɪn hɪz oʊn ˈhaʊs ðæn ə ˈwaɪz mæn ɪn əˈnʌð.ər/
"a fool knows more in his own house than a wise man in another" picture
1.

El necio sabe más en su propia casa que el sabio en otra.